hangulin.txt For Vim version 9.0. Last change: 2019 Nov 21 VIM REFERENCE MANUAL by Chi-Deok Hwang and Sung-Hyun Nam hangul Vim had built-in support for hangul, the Korean language, for users without XIM (X Input Method). Since it didn't work well and was not maintained it was removed in Vim 8.1.2327. If you want this hangul input method you can go back to Vim 8.1.2326 or earlier. If you think this code is still useful and want to maintain it, make a patch to add it back. However, making it work with UTF-8 encoding would be best.